Lisa Pollini was last seen in the Lobelia Lane area of Cringleford on Tuesday, and last night (Thursday) the police helicopter was helping police officers on the ground in the search for Ms Pollini in the Cringleford and Mulbarton areas.

Separately, the emergency services were called to the UEA Broad this afternoon to help a woman who got stuck in water while walking her dog.

They were called at 2.57pm, and the Norfolk Fire and Rescue service’s urban search and rescue team and two crews of firefighters from Earlham and Carrow were sent to the scene.

The woman was manually assisted using water rescue equipment and the rescue sled.

Police said the search in the area for Ms Pollini, in a similar area, is ongoing.

Ms Pollini is described as white, 5ft 3in tall, of slight build and with white hair.

A police statement said Ms Pollini was described as “vulnerable” and urged anybody who knew of her whereabouts to get in touch.

Police are also appealing to Ms Pollini directly to get in contact so that her family know she is safe and well.

• Anyone with information is asked to contact Norfolk Constabulary immediately on 101.